linux-kernel - [PATCH 01/10] ASoC: core: Add snd_soc_dai_set_tdm_slot

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Date:	Wed, 26 Feb 2014 11:59:26 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<broonie@...nel.org>, <lgirdwood@...il.com>
CC:	<timur@...i.org>, <tiwai@...e.de>, <lars@...afoo.de>,
	<Guangyu.Chen@...escale.com>, <fabio.estevam@...escale.com>,
	<shawn.guo@...aro.org>, <denis@...rea.com>, <mpa@...gutronix.de>,
	<s.hauer@...gutronix.de>, <moinejf@...e.fr>,
	<kuninori.morimoto.gx@...esas.com>, <alsa-devel@...a-project.org>,
	<linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH 01/10] ASoC: core: Add snd_soc_dai_set_tdm_slot_xlate().

For most cases the rx_mask and tx_mask params have no use for
snd_soc_dai_set_tdm_slot(), because they could be generated by
{XXX_ .}of_xlate_tdm_slot_mask().

This patch add snd_soc_dai_set_tdm_slot_xlate() which will replace
the snd_soc_dai_set_tdm_slot() in some use cases to simplify the
code. And for some CODECs or CPU DAI devices there needed much more
work to support the .of_xlate_tdm_slot_mask feature.

This patch can be applied to most use case of the current DAI drivers.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
 include/sound/soc-dai.h |  3 +++
 sound/soc/soc-core.c    | 33 ++++++++++++++++++++++++++++-----
 2 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index d86e0fc..68569ee 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -110,6 +110,9 @@ int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio);
 /* Digital Audio interface formatting */
 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt);
 
+int snd_soc_dai_set_tdm_slot_xlate(struct snd_soc_dai *dai,
+				   unsigned int slots,
+				   unsigned int slot_width);
 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width);
 
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 0911856..e5a535b 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3687,19 +3687,20 @@ static int snd_soc_of_xlate_tdm_slot_mask(unsigned int slots,
 }
 
 /**
- * snd_soc_dai_set_tdm_slot - configure DAI TDM.
+ * snd_soc_dai_set_tdm_slot_xlate - configure DAI TDM with of xlate.
  * @dai: DAI
- * @tx_mask: bitmask representing active TX slots.
- * @rx_mask: bitmask representing active RX slots.
  * @slots: Number of slots in use.
  * @slot_width: Width in bits for each slot.
  *
  * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
  * specific.
  */
-int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
-	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
+int snd_soc_dai_set_tdm_slot_xlate(struct snd_soc_dai *dai,
+				   unsigned int slots,
+				   unsigned int slot_width)
 {
+	unsigned int tx_mask, rx_mask;
+
 	if (dai->driver && dai->driver->ops->of_xlate_tdm_slot_mask)
 		dai->driver->ops->of_xlate_tdm_slot_mask(slots,
 						&tx_mask, &rx_mask);
@@ -3712,6 +3713,28 @@ int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
 	else
 		return -ENOTSUPP;
 }
+EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot_xlate);
+
+/**
+ * snd_soc_dai_set_tdm_slot - configure DAI TDM.
+ * @dai: DAI
+ * @tx_mask: bitmask representing active TX slots.
+ * @rx_mask: bitmask representing active RX slots.
+ * @slots: Number of slots in use.
+ * @slot_width: Width in bits for each slot.
+ *
+ * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
+ * specific.
+ */
+int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
+	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
+{
+	if (dai->driver && dai->driver->ops->set_tdm_slot)
+		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
+				slots, slot_width);
+	else
+		return -ENOTSUPP;
+}
 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
 
 /**
-- 
1.8.4


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